Floimac.png Floppy Image Access Utility for accessing ST floppy image files on Atari ST and compatible machines equipped with mass storage - hard drives, Flash card adapters and like. Purpose of this is not exactly same as with program Floppy Image Runner. This is not intended for running SW from i...

If you check some ST schematic, will see that Hi and Lo ROM chip /CE pins are connected to same line, so no separated UDS and LDS activation. I was going by the diagram at start of thread, it uses LDS & UDS. Also same here.. http://dev-docs.exxoshost.co.uk/Test_Cartridge.pdf My point is that if it ...

"If it does read in 16bit, then LDS & UDS will go low at the same time, and I could probably get away with using LDS for CE, and ignore UDS. Not pretty, but would work assuming 16bit access. " CPU will ignore lower or higher 8 bits if only UDS or LDS is asserted. But you can not ignore UDS - because...

I made better TOS 1.04 mod for 68020/30 + TOS 1.62 mod for STE machines with CPU upgrade. In both cases it works with 68000 CPUs and those with large stackframe - so 68010/20/30 . TOS 1.04 mod uses AES and Desktop from 1.62 - because that's the only way - and of course start address is not $FC0000 b...

A small thought... 020 CPU support in TOS104. As most know, forced to move to TOS206 to use the 020 CPU. That will not work because of used Line-F emulator in Desktop. What would be another flaw of TOS - it was used to make all it fit in 192KB ROM space - Line-F emulation is basically subrutine cal...

What is best solution in case of ST is to have TOS switch with extra logic for TOS 2.06 - then can use older TOS 1.xx and 2.06 , And it can be more than 2 TOS version - like 1.02, 1.04 , 2.06 + some patched ... All it can fit in 2 (Flash)EPROM chips. And to add that 2 ROM for 2.06 is not same as 2 R...

My biggest TOS mod, what can be really useful: http://atari.8bitchip.info/tos105.html Yes, it can even save some RAM too. But more important is more efficient work with hard disks, mass storage. Now I need to put it in my Mega STE - what will need probably some extra patches, to make that machine wo...